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Cardiac myxoma — RACP Paediatrics MCQ

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HardCardiologyCardiac myxomaRACP Paediatrics

A 14-year-old presents with a syncopal episode. Echocardiography reveals a mobile, pedunculated mass attached to the interatrial septum (fossa ovalis) prolapsing through the mitral valve. What is the most likely cardiac tumour?

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Correct answer: A — Myxoma

A pedunculated, mobile mass arising from the interatrial septum (fossa ovalis) is characteristic of a cardiac myxoma. It is the most common primary cardiac tumour in adults but rare in children. It can cause embolism, valvular obstruction, and constitutional symptoms. Surgical excision is curative.

Reference: RACP Paediatric Curriculum – Cardiology; RCH Melbourne – 2023